holmes was one of the half-dozen ph.d. students with federal grants for the national institutes of health, studying neuroscience. and those who know holmes call him quiet and an introvert. >> a nice kid, grew up in a nice neighborhood, and i don't know what happened >> he was the kind of person that if you teased him, he would just sort of sit there and smile and really not do anything about it. >> according to reports, holmes is in a county jail, apparently locked up for his own protection. he is due in court on monday. >> late saturday there were false reports of a second suspect, but police interviewed a person of interest and dismissed him. reporting in aurora, colorado, rebecca stevens, abc7 news. >> as often happens after the mass shootings, the colorado shootings have turned the spotlight on gun control. suspect james holmes appears to have obtained his arsenal legally. tom lost his son daniel in the killings at columbine high school. he said not enough has been done to toughen gun laws since that massacre that left